ProgramNode(0...9)(
  [],
  StatementsNode(0...9)(
    [CallNode(0...7)(
       nil,
       nil,
       (0...1),
       nil,
       ArgumentsNode(2...7)(
         [StringNode(2...7)((2...3), (3...6), (6...7), "\\n")]
       ),
       nil,
       nil,
       0,
       "a"
     ),
     CallNode(8...9)(nil, nil, (8...9), nil, nil, nil, nil, 0, "b")]
  )
)
